It’s not that rare earth elements like neodymium ... the need for rare-earth metals. Iron nitrides are nothing new. Nitriding processes, such as gas nitriding by exposing heated steel to ammonia ...

Iron is an element. It is made of only one type of atom ... Is helium a solid, liquid or a gas? Is it made up of atoms or molecules? Helium is a gas made up of atoms. Each particle is on its ...

Iron is the main ingredient in various forms of iron and steel, but the various types of metals contain other elements as well. Sometimes these elements are unwanted; other times they're ...